Photographic-plate holder.



No.' 717,695. PATENTBD JAN. 6, 190s.

P. V. MATHEWS.

PHOTOGRAPHIG' PLATE HOLDER.

APPLICATION FILED MAY 3l, 1902.

H0 MODEL.

\/\/|TNE55E5 INVENTUR.. j )5MM La Z UNITED STATES PATENT OEEIcE.

FRANK V. MATHEWS, OF ROCHESTER, NEW YORK, ASSIGNOR TQ ROCHES- TER PLATE HOLDER COMPANY, OF ROCHESTER, NEW YORK, A CORPO- RATION OF NEV YORK.

PHOTOGRAPHIC-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent No. 717,695, dated January 6, 1903. Application tied May 31,1902. serai No. 109,587. oto modem To all whom t may concern.-

Be it known that I, FRANK V. MATHEws, a citizen of the United States, and a resident of Rochester, in the county of Monroe andState of New York, have invented certain new and useful Improvements in Photographic-Plate Holders, of which the following is a specification.

This invention relates to photographic-plate 1o holders; and it consists of a simplified and improved mechanism whereby plates of different sizes may be held in the same plateholder and by the same mechanism therein.

In the drawings, Figure l is a front elevation of a plate-holder embodying this invention, and Fig. 2 is a cross-section on the line 2 2 of Fig. l.

As an example of this device a single plateholder is shown consisting of the frame A,

zo having the back ct. The plate-holder is provided with the usual slide B. lVithin the plate-holder and on opposite internal edges of the frame are a pair of flat bowed springs C C, suitably fastened to the frame, as by means of the screws o, said screws passing` through perforations in the springs and into the frame A. The ends ofthe springs C curve toward the medial line ofthe plate-holder, as shown in Fig. l, and are adapted -to exert 3o pressure toward each other. On the end ofY each spring and'extending along the opposed faces ofthe two springs are pads c,that maybe made of felt, leather, or other suitable substance that may be indented, but are preferably of softindia-rubber. The plate D is rectangular, as usual, and its corners or edges rest upon the pads c', and, indenting the same, plates of diiferent sizes will be heldin proper position by the pressure of the springs. The pads c are shown as fastened to the springs C and extending around the ends of the said springs. This tends to increase the capacity of the plate-holder for plates of different sizes. Said pads may becemented to the springs or may be held on thespr-ings by means of rivets.

(Not shown.)

This device isvery cheap, very simple, and obviates the nicking or breaking of the cor- `ners of the plates by the direct pressure of 5o metal thereon, and also holds the plates firmly by reason of the indenting of the pads and without danger of injury to the plate.

What I claim isl. In a photographic-plate holder, a frame, springs attached to opposite sides of the interior of the frame and adapted to exert pressure toward each other andhaving compressible pads upon their opposed faces, whereby a plate indents said pads and is held by the pressure of the springs. 6o

2. In a photographic-plate holder, a frame, bowed springs attached to opposite sides of the interior of the frame and adapted to exert pressure toward each other and having compressible pads upon their opposedv faces, whereby a plate indents said pads and is held by the pressure of the springs.

3. In a photographic-plate holder, a frame,

a liat bowed spring attached to each of two opposite sides of the interior of the frame and 7o adapted to exert pressure toward each other and having compressible pads upon their opposed faces, whereby a Aplate indents said pads and is held by the pressure of the springs.

4. In a photographic-plate holder, a frame, a flat bowed spring attached to each of the two opposite sides of the interior of the frame and adapted to exert pressure toward each other, and having india-rubber pads on their opposed faces, whereby a plate indents said 8o padsand is held by thepressure of the springs.

5. Ina photographic-plate holder, a frame,

a spring attached'to one side of the interior of theframe and adapted to exert pressure toward the opposite side thereof and having compressible padding thereon, in combination with means for engaging a plate on said opposite side of the frame, whereby a plate indents said padding and is held in the plateholder by the spring-pressure. 9o

6. In a photographic-plate holder, a frame,

a spring attached to one side of the interior of the frame and adapted to exert pressure toward the opposite side thereof and having compressible padding thereon, in combination with spring means for engaging a plate on said opposite side of the frame, whereby a plate indents said padding and is held in the plate-holder by the spring-pressure.

FRANK V. MATHEWS.

Witnesses:

F. BIssELL, D. GURNEE. 

